Lead-acid battery

Patent metadata

Field	Value
Publication number	US-10522837-B2
Application number	US-201415039334-A
Country	US
Kind code	B2
Filing date	Nov 21, 2014
Priority date	Nov 29, 2013
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A lead-acid battery includes a separator retaining an electrolyte solution, a positive electrode plate, a negative electrode plate, and a container. A negative electrode material contains bisphenols condensate, and a theoretical capacity ratio of the negative electrode material to a positive electrode material is 0.85 or more and 1.2 or less.

First claim

The invention claimed is:

1. A lead-acid battery comprising a separator retaining an electrolyte solution, a positive electrode plate, a negative electrode plate, and a container,
wherein a negative electrode material of the negative electrode plate contains bisphenols condensate,
a theoretical capacity ratio B/A of a theoretical capacity B of the negative electrode material to a theoretical capacity A of a positive electrode material of the positive electrode plate is 0.85 or more and 1.2 or less,
the separator is a nonwoven fabric-like or mat-like separator made of glass fibers or synthetic resin fibers, and
a median pore size of the nonwoven fabric-like or mat-like separator is 3 μm or more and 8 μm or less in a state in which a compression force of 30 to 50 kg/dm 2 is applied to the nonwoven fabric-like or mat-like separator retaining the electrolyte solution in the container.

2. The lead-acid battery according to claim 1 , wherein the negative electrode material further contains carbon black.

3. The lead-acid battery according to claim 2 , wherein the negative electrode material contains the carbon black in an amount of 0.1% by mass or more and 1.5% by mass or less.

4. The lead-acid battery according to claim 1 , wherein the lead-acid battery is a retainer type lead-acid battery.

5. The lead-acid battery according to claim 1 , wherein the negative electrode material contains the bisphenols condensate in an amount of 0.05% by mass or more and 0.25% by mass or less.

6. The lead-acid battery according to claim 1 , wherein the bisphenols condensate is bisphenols formaldehyde condensate.

7. The lead-acid battery according to claim 1 , wherein the negative electrode plate retains 15% by mass or more of a total amount of the electrolyte solution.

8. The lead-acid battery according to claim 1 , wherein the negative electrode plate retains 15% by mass or more and 25% by mass or less of a total amount of the electrolyte solution.

9. The lead-acid battery according to claim 1 , wherein the theoretical capacity ratio B/A is 0.9 or more and 1.2 or less.

Assignees

• Gs Yuasa Int Ltd

Inventors

• Motoi Ikumi

Classifications

• H01M4/14

  Electrodes for lead-acid accumulators · CPC title

• H01M10/06

  Lead-acid accumulators (semi-lead accumulators H01M10/20) · CPC title

• H01M4/62

  Selection of inactive substances as ingredients for active masses, e.g. binders, fillers · CPC title

• H01M4/628 Primary

  Inhibitors, e.g. gassing inhibitors, corrosion inhibitors · CPC title

• H01M10/08

  Selection of materials as electrolytes · CPC title